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A straight piece of wire 5 cm long is pl...

A straight piece of wire 5 cm long is placed horizontally on the surface of water and gently pulled up. It is found that a force of `7 xx 10^(-3) N` in addition to weight of wire is required for that purpose. The surface tension of water is

A

`7 xx 10^(-2) N//m`

B

`7 xx 10^(-1) N//m`

C

`7 xx 10^(-3) N//m`

D

`3.5 xx 10^(-2) N//m`

Text Solution

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The correct Answer is:
A
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